diff -Nru fwupd-1.5.11/debian/changelog fwupd-1.5.11/debian/changelog
--- fwupd-1.5.11/debian/changelog	2021-07-23 15:14:53.000000000 +0800
+++ fwupd-1.5.11/debian/changelog	2021-12-08 11:20:23.000000000 +0800
@@ -1,3 +1,10 @@
+fwupd (1.5.11-0ubuntu1~20.04.3~1) focal; urgency=medium
+
+  * Back port commit synaptics-prometheus: Fix enumeration of the config child
+    from upstream. (LP: #1953573)
+
+ -- Andy Chi <andy.chi@canonical.com>  Wed, 08 Dec 2021 11:20:23 +0800
+
 fwupd (1.5.11-0ubuntu1~20.04.2) focal; urgency=medium
 
   * force to use libjcat >= 0.1.3, or signature verification will failed.
diff -Nru fwupd-1.5.11/debian/patches/series fwupd-1.5.11/debian/patches/series
--- fwupd-1.5.11/debian/patches/series	2021-07-01 09:06:11.000000000 +0800
+++ fwupd-1.5.11/debian/patches/series	2021-12-08 11:20:23.000000000 +0800
@@ -1 +1,2 @@
 0001-gsub-034.patch
+synaptics-prometheus-Fix-enumeration-of-the-config-child.patch
diff -Nru fwupd-1.5.11/debian/patches/synaptics-prometheus-Fix-enumeration-of-the-config-child.patch fwupd-1.5.11/debian/patches/synaptics-prometheus-Fix-enumeration-of-the-config-child.patch
--- fwupd-1.5.11/debian/patches/synaptics-prometheus-Fix-enumeration-of-the-config-child.patch	1970-01-01 08:00:00.000000000 +0800
+++ fwupd-1.5.11/debian/patches/synaptics-prometheus-Fix-enumeration-of-the-config-child.patch	2021-12-08 11:20:23.000000000 +0800
@@ -0,0 +1,30 @@
+From 832231da9c1c3cc8a40ea9145a1925f85f237a98 Mon Sep 17 00:00:00 2001
+From: Richard Hughes <richard@hughsie.com>
+Date: Tue, 15 Jun 2021 17:18:55 +0100
+Subject: [PATCH] synaptics-prometheus: Fix enumeration of the config child
+
+Do not manually call config setup before adding the parent.
+
+The ->setup() action is called on children explicitly in fu_device_setup()
+after the parent device has all the required properties.
+
+Fixes https://github.com/fwupd/fwupd/issues/3364
+---
+ plugins/synaptics-prometheus/fu-synaprom-device.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+Index: fwupd/plugins/synaptics-prometheus/fu-synaprom-device.c
+===================================================================
+--- fwupd.orig/plugins/synaptics-prometheus/fu-synaprom-device.c
++++ fwupd/plugins/synaptics-prometheus/fu-synaprom-device.c
+@@ -221,10 +221,6 @@ fu_synaprom_device_setup (FuDevice *devi
+ 	    !fu_device_has_flag (device, FWUPD_DEVICE_FLAG_IS_BOOTLOADER) &&
+ 	    pkt.security[1] & FU_SYNAPROM_SECURITY1_PROD_SENSOR) {
+ 		g_autoptr(FuSynapromConfig) cfg = fu_synaprom_config_new (self);
+-		if (!fu_device_setup (FU_DEVICE (cfg), error)) {
+-			g_prefix_error (error, "failed to get config version: ");
+-			return FALSE;
+-		}
+ 		fu_device_add_child (FU_DEVICE (device), FU_DEVICE (cfg));
+ 	}
+